Two candles.
Same size.
Different brands.
What’s in them that make some burn longer than others?
In: Chemistry
They may have different types of wax blends, their wicks may be different sizes or makes, the atmospheric conditions of environment may be playing a role, or the burn may simply be off for one such as the flame not pulling enough wax, burning the wick, and the smaller wick now burns much dimmer and much slower as a result.
However assuming identical conditions it’s most often the wax and wick size that determines how long the candle lasts. Some candles also have additives that slow down or speed up combustion depending on what the candle maker wants out of the product.
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